Welcome to Hard Talk from the BBC World Service with me, Stephen Saker.

Today I'm in the Norwegian capital, Oslo, where dignitaries have gathered to honour this year's

winner of the Nobel Peace Prize, the Japanese organisation Nihon Hidankyo.

It was set up a decade after the end of World War II to advocate on behalf of the survivors

of the two atomic bombs dropped by the Americans on Hiroshima and Nagasaki, a devastating

revolution in destructive power which raised the specter of war as an extinction-level event.

More than 200,000 people were killed by those two atomic bombs.

Many more died of the long-term effects of radiation exposure.

The survivors came together in the mid-1950s to express their fury

at the way their suffering and needs had been ignored

by the post-war government in Japan, and just as important to lobby the world to renounce

nuclear weapons and ensure no repeat of their suffering.

My guest is Terumi Tanaka, who, as a 13-year-old boy, survived the

A-bomb which destroyed much of his home city, Nagasaki. He's now 92, and co-chair of Nihon

Hidankyo. He's devoted his life to making a repeat of his experience unthinkable.

Does he fear he has failed? Well, he joins me now.

Terumi Tanaka, welcome to hard talk. Thank you very much. I want to begin by asking you how you feel about being here in Oslo, this extraordinary journey your life has taken from a 13-year-old

boy in Nagasaki in 1945 to here receiving the Nobel Peace Prize. What are your emotions today?

After I experienced the atomic bombing, I was convinced that nuclear weapons should not be used again.

For many years, I've continued to work towards the abolition of nuclear weapons,

and it was very difficult to see results of this movement.

Nuclear weapons continue to increase in the world.

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